Resonance Lab - Resonance: Measuring Wavelengths of Sound...

Purpose: Using closed tubes, determine the velocities and wavelengths of sound using various lengths and tuning forks. Hypothesis: At each interval where resonance can be found, each distance should have a proportional length, i.e. perhaps, something at 300 Hz will have proportional lengths of 10 cm every time a resonance point is reached. Materials:  Resonance apparatus (graduated cylinder)  Tuning forks (320 Hz, 384 Hz, 512 Hz)  Rubber mallet  Beaker full of water Procedure: First, set up the resonance apparatus, making sure that it is filled with water and attached to a beaker also filled with water. Next, note the initial water level in the cylinder (for us, it was 5 cm). Afterwards, grab the first tuning fork, strike it on the rubber mallet, and hold it parallel to the graduated cylinder, allowing for maximum exposure in the cylinder’s opening. As the water level decreases, mark the distance each time the sound (or vibration of the tuning fork) fully resonates. Then repeat the same process with the two other tuning forks.

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